CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Millions	Total	Capital Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Balance, beginning of period at Dec. 31, 2022		$ 18.6	$ 140.7	$ 1,098.4	$ (85.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued for vested restricted stock units, net of shares withheld for taxes		0.0	(2.5)
Shares repurchased		0.0	0.0
Equity compensation expense			2.1
Net income (loss)	$ (3.5)			(3.5)
Other comprehensive income (loss)	9.7				9.7
Balance, end of period at Mar. 31, 2023	1,178.3	18.6	140.3	1,094.9	(75.5)
Balance, beginning of period at Dec. 31, 2023	1,259.0	18.6	151.8	1,155.0	(66.4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued for vested restricted stock units, net of shares withheld for taxes		0.1	(1.2)
Shares repurchased	(0.2)	0.0	(0.3)
Equity compensation expense			3.5
Net income (loss)	7.8			7.8
Other comprehensive income (loss)	(9.1)				(9.1)
Balance, end of period at Mar. 31, 2024	$ 1,259.8	$ 18.7	$ 153.8	$ 1,162.8	$ (75.5)